2021012222220 has 72 divisors (see below), whose sum is σ = 6130932727920. Its totient is φ = 538890088320.

The previous prime is 2021012222179. The next prime is 2021012222221. The reversal of 2021012222220 is 222222101202.

2021012222220 is a `hidden beast` number, since 2 + 0 + 210 + 12 + 222 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2021012222193 and 2021012222202.

It is not an unprimeable number, because it can be changed into a prime (2021012222221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1633026 + ... + 2590134.

Almost surely, 2^{2021012222220} is an apocalyptic number.

2021012222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021012222220 is an abundant number, since it is smaller than the sum of its proper divisors (4109920505700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021012222220 is a wasteful number, since it uses less digits than its factorization.

2021012222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968855 (or 968850 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2021012222220 its reverse (222222101202), we get a palindrome (2243234323422).

The spelling of 2021012222220 in words is "two trillion, twenty-one billion, twelve million, two hundred twenty-two thousand, two hundred twenty".